Doktor G is an executive of Destron and the first Destron general to confront V3. He is a major antagonist Kamen Rider V3.



Doktor G originated from Germany and arrived in Japan after he was contacted by Great Leader of Destron who gave him orders to oversee their operations and to defeat Kamen Rider V3, Shiro Kazami.

Doktor G was responsible for the resurrection of Shocker's key figures (Colonel Zol, Doctor Shinigami, Ambassador Hell, and General Black) to carry out an attack on Tokyo.

After numerous failures, Doktor G summoned the spirits of his dead, evil warriors to transform him into Crab Laser for his final battle with Kamen Rider V3. Despite putting up a good fight, he was destroyed by V3's V3 Tailspin Return Kick.


After so many of his plans were thwarted by V3 and his laboratory was destroyed by a special Interpol group known as the "Destron hunters." He personally confronted the hunters and killed them all (except for Ken Sakuma who was saved by V3).

Doktor G set a trap for V3 as an act of redemption for his failure as a Destron Commander, he kidnapped Tōbei Tachibana and the members of the Kamen Rider Scouts to lure V3. Doktor G summoned the spirits of his dead, evil warriors to transform him into Crab Laser for his final battle with Kamen Rider V3. Despite putting up a heroic battle, he was destroyed by V3's V3 Tailspin Return Kick.

Super Hero Taisen


Doktor G in Superhero Taisen

Narutaki disguised himself as Doktor G to become a general of the revived Dai-Shocker. He served as second-in-command of the organization, standing bellow only the Great Leader. He was secretly the driving force behind Dai-Shocker's return, reviving and recruiting past villains as well as placing Tsukasa Kadoya/Kamen Rider Decade as its figurehead leader for the expressed goal of defeating Dai-Zangyack and its leader, Emperor Marvelous, formerly Gokai Red and the leader of the Kaizoku Sentai Gokaiger.

Narutaki's guise was later lifted after his New Kani Laser form was defeated by Decade in the final battle with the borrowed powers of the Goseigers, prompting Narutaki to quickly flee.


Showa Era Kamen Rider Villains

Colonel Zol | Dr. Shinigami | Ambassador Hell | Shocker Riders | Shocker Kaijin | Shocker Combatmen

Great Leader of Gel-Shocker | General Black | Gel-Shocker Kaijin | Gel-Shocker Combatmen

Great Leader of Destron | Doktor G | Baron Fang | Archbishop Wing | Marshal Armor | Destron Inhumanoids | Destron Combatmen

Government of Darkness
King Dark | Dr. Noroi | Apollo Geist | G.O.D. Kaijin | G.O.D. Warfare Agents

Ruler | Ten-Faced Demon Gorgos | Beastmen | Akajusha

Garanda Empire
Ruler | Great Emperor Zero | Beastmen | Kurojusha

Black Satan
Great Boss of Black Satan | Mr. Titan | Dead Lion | Kikkaijin | Black Satan Soldiers

Delza Army
General Shadow | Staff Officer Steel | Division Commander Wild Eagle | Doctor Kate | Major Skull | Baron Rock | General Wolf | Commanding Officer Frank | Snake Woman | Marshal Machine | Commander Jishaku | Armored Knight | Great Boss of Delza Army | Delza Army Corps

Neo-Shocker's Great Leader | General Monster | Admiral Majin | Galaxy King | Neo-Shocker Kaijin | Ari Commandos

Dogma Kingdom
Emperor Terror Macro | General Megarl | Dogma Kaijin | Dogma Bodyguards | Dogma Fighters

Jin Dogma
Marshal Demon | Princess Youkai | Commander Onibi | Doctor Ghost | Staff Officer Witch | Jin Dogma Kaijin | Jin Fighters

Badan Empire
Generalissimo of Badan | Ambassador Darkness | Roids | Combat-Roids

Shadow Moon | High Priests (High Priest Darom | High Priest Baraom | High Priestess Bishium) | Sword Master Birugenia | Creation King | Gorgom Mutants

Crisis Empire
General Jark | Intelligence Staff Officer Maribaron | Naval Commander Bosgan | Captain Gatenzone | Captain Gedorian | Crisis Empire Kaijin | Chaps